Measurements are presented of differential crosss√
ections for top quark pair production in pp collisions at
s = 7 TeV relative to the total inclusive top quark pair production
cross-section. A data sample of 2.05 fb−1 recorded
by the ATLAS detector at the Large Hadron Collider is used.
Relative differential cross-sections are derived as a function
of the invariant mass, the transverse momentum and the rapidity
of the top quark pair system. Events are selected in the
lepton (electron or muon) + jets channel. The backgroundsubtracted
differential distributions are corrected for detector
effects, normalized to the total inclusive top quark pair
production cross-section and compared to theoretical predictions.
The measurement uncertainties range typically between
10 % and 20 % and are generally dominated by systematic
effects. No significant deviations from the Standard
Model expectations are observed.
1 Introduction

Measurements are presented of differential crosss√
ections for top quark pair production in pp collisions at
s = 7 TeV relative to the total inclusive top quark pair production
cross-section. A data sample of 2.05 fb−1 recorded
by the ATLAS detector at the Large Hadron Collider is used.
Relative differential cross-sections are derived as a function
of the invariant mass, the transverse momentum and the rapidity
of the top quark pair system. Events are selected in the
lepton (electron or muon) + jets channel. The backgroundsubtracted
differential distributions are corrected for detector
effects, normalized to the total inclusive top quark pair
production cross-section and compared to theoretical predictions.
The measurement uncertainties range typically between
10 % and 20 % and are generally dominated by systematic
effects. No significant deviations from the Standard
Model expectations are observed.
1 Introduction